Field Piping and Wiring
Si21-205
26
Field Piping and Wiring
1. Field Piping and Wiring
1.1
Precautions for New Refrigerant (R410A)
1.1.1 Outline
About Refrigerant R410A
Characteristics of new refrigerant, R410A
1. Performance
Almost the same performance as R22 and R407C
2. Pressure
Working pressure is approx. 1.4 times more than R22 and R407C.
3. Refrigerant composition
Few problems in composition control, since it is a Quasi-azeotropic mixture refrigerant.
1. Non-azeotropic mixture refrigerant: mixture of two or more refrigerants having different
boiling points.
2. Quasi-azeotropic mixture refrigerant: mixture of two or more refrigerants having similar
boiling points.
3. The design pressure is different at each product. Please refer to the installation manual for
each product.
(Reference) 1 Mpa
10.19716 kgf / cm
2
HFC units (Units using new refrigerants)
HCFC units
Refrigerant name
R407C
R410A
R22
Composing
substances
Non-azeotropic mixture
of HFC32, HFC125 and
HFC134a (*1)
Quasi-azeotropic mixture
of HFC32 and JFC125
(*1)
Single-component
refrigerant
Design pressure
3.2 Mpa (gauge pressure)
= 32.6 kgf/cm
2
4.15 Mpa
(gauge
pressure)
= 42.3 kgf/cm
2
2.75Mpa
(gauge pressure)
= 28.0 kgf/cm
2
Refrigerant oil
Synthetic oil (Ether)
Mineral oil (Suniso)
Ozone destruction
factor (ODP)
0
0
0.05
Combustibility
None
None
None
Toxicity
None
None
None
Pressure-Enthalpy curves of HFC-32/125 (50/50wt%)
Summary of Contents for Sky Air B-Series R-410A
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